US 12,031,215 B2
Zinc alloy coating layer of press-hardenable steel
Weiping Sun, Charlotte, NC (US); Nan Gao, Vancouver (CA); and Yihui Liu, Vancouver (CA)
Assigned to NUCOR CORPORATION, Charlotte, NC (US); and TECK METALS LTD., Vancouver (CA)
Appl. No. 17/794,885
Filed by NUCOR CORPORATION, Charlotte, NC (US); and TECK METALS LTD., Vancouver (CA)
PCT Filed Jan. 29, 2020, PCT No. PCT/US2020/015621
§ 371(c)(1), (2) Date Jul. 22, 2022,
PCT Pub. No. WO2021/154240, PCT Pub. Date Aug. 5, 2021.
Prior Publication US 2023/0066303 A1, Mar. 2, 2023
Int. Cl. C23F 13/06 (2006.01); C23C 2/28 (2006.01)
CPC C23F 13/06 (2013.01) [C23C 2/28 (2013.01); C23C 2/29 (2022.08)] 14 Claims
 
1. A post-hot pressed cathodic corrosion-protection coating of a sheet steel, the corrosion-protection coating comprising a surface, the surface comprising surface oxides of iron, zinc, aluminum, and manganese; wherein a ratio of atomic weight percent amount of zinc to oxygen is about 0.3 to about 0.7 in the surface oxides.